Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * CS4271 ASoC codec driver
3 *
4 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * This driver support CS4271 codec being master or slave, working
17 * in control port mode, connected either via SPI or I2C.
18 * The data format accepted is I2S or left-justified.
19 * DAPM support not implemented.
20 */
21
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/delay.h>
25#include <linux/gpio.h>
26#include <linux/i2c.h>
27#include <linux/spi/spi.h>
28#include <linux/of.h>
29#include <linux/of_device.h>
30#include <linux/of_gpio.h>
31#include <sound/pcm.h>
32#include <sound/soc.h>
33#include <sound/tlv.h>
34#include <sound/cs4271.h>
35
36#define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
37 SNDRV_PCM_FMTBIT_S24_LE | \
38 SNDRV_PCM_FMTBIT_S32_LE)
39#define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
40
41/*
42 * CS4271 registers
43 */
44#define CS4271_MODE1 0x01 /* Mode Control 1 */
45#define CS4271_DACCTL 0x02 /* DAC Control */
46#define CS4271_DACVOL 0x03 /* DAC Volume & Mixing Control */
47#define CS4271_VOLA 0x04 /* DAC Channel A Volume Control */
48#define CS4271_VOLB 0x05 /* DAC Channel B Volume Control */
49#define CS4271_ADCCTL 0x06 /* ADC Control */
50#define CS4271_MODE2 0x07 /* Mode Control 2 */
51#define CS4271_CHIPID 0x08 /* Chip ID */
52
53#define CS4271_FIRSTREG CS4271_MODE1
54#define CS4271_LASTREG CS4271_MODE2
55#define CS4271_NR_REGS ((CS4271_LASTREG & 0xFF) + 1)
56
57/* Bit masks for the CS4271 registers */
58#define CS4271_MODE1_MODE_MASK 0xC0
59#define CS4271_MODE1_MODE_1X 0x00
60#define CS4271_MODE1_MODE_2X 0x80
61#define CS4271_MODE1_MODE_4X 0xC0
62
63#define CS4271_MODE1_DIV_MASK 0x30
64#define CS4271_MODE1_DIV_1 0x00
65#define CS4271_MODE1_DIV_15 0x10
66#define CS4271_MODE1_DIV_2 0x20
67#define CS4271_MODE1_DIV_3 0x30
68
69#define CS4271_MODE1_MASTER 0x08
70
71#define CS4271_MODE1_DAC_DIF_MASK 0x07
72#define CS4271_MODE1_DAC_DIF_LJ 0x00
73#define CS4271_MODE1_DAC_DIF_I2S 0x01
74#define CS4271_MODE1_DAC_DIF_RJ16 0x02
75#define CS4271_MODE1_DAC_DIF_RJ24 0x03
76#define CS4271_MODE1_DAC_DIF_RJ20 0x04
77#define CS4271_MODE1_DAC_DIF_RJ18 0x05
78
79#define CS4271_DACCTL_AMUTE 0x80
80#define CS4271_DACCTL_IF_SLOW 0x40
81
82#define CS4271_DACCTL_DEM_MASK 0x30
83#define CS4271_DACCTL_DEM_DIS 0x00
84#define CS4271_DACCTL_DEM_441 0x10
85#define CS4271_DACCTL_DEM_48 0x20
86#define CS4271_DACCTL_DEM_32 0x30
87
88#define CS4271_DACCTL_SVRU 0x08
89#define CS4271_DACCTL_SRD 0x04
90#define CS4271_DACCTL_INVA 0x02
91#define CS4271_DACCTL_INVB 0x01
92
93#define CS4271_DACVOL_BEQUA 0x40
94#define CS4271_DACVOL_SOFT 0x20
95#define CS4271_DACVOL_ZEROC 0x10
96
97#define CS4271_DACVOL_ATAPI_MASK 0x0F
98#define CS4271_DACVOL_ATAPI_M_M 0x00
99#define CS4271_DACVOL_ATAPI_M_BR 0x01
100#define CS4271_DACVOL_ATAPI_M_BL 0x02
101#define CS4271_DACVOL_ATAPI_M_BLR2 0x03
102#define CS4271_DACVOL_ATAPI_AR_M 0x04
103#define CS4271_DACVOL_ATAPI_AR_BR 0x05
104#define CS4271_DACVOL_ATAPI_AR_BL 0x06
105#define CS4271_DACVOL_ATAPI_AR_BLR2 0x07
106#define CS4271_DACVOL_ATAPI_AL_M 0x08
107#define CS4271_DACVOL_ATAPI_AL_BR 0x09
108#define CS4271_DACVOL_ATAPI_AL_BL 0x0A
109#define CS4271_DACVOL_ATAPI_AL_BLR2 0x0B
110#define CS4271_DACVOL_ATAPI_ALR2_M 0x0C
111#define CS4271_DACVOL_ATAPI_ALR2_BR 0x0D
112#define CS4271_DACVOL_ATAPI_ALR2_BL 0x0E
113#define CS4271_DACVOL_ATAPI_ALR2_BLR2 0x0F
114
115#define CS4271_VOLA_MUTE 0x80
116#define CS4271_VOLA_VOL_MASK 0x7F
117#define CS4271_VOLB_MUTE 0x80
118#define CS4271_VOLB_VOL_MASK 0x7F
119
120#define CS4271_ADCCTL_DITHER16 0x20
121
122#define CS4271_ADCCTL_ADC_DIF_MASK 0x10
123#define CS4271_ADCCTL_ADC_DIF_LJ 0x00
124#define CS4271_ADCCTL_ADC_DIF_I2S 0x10
125
126#define CS4271_ADCCTL_MUTEA 0x08
127#define CS4271_ADCCTL_MUTEB 0x04
128#define CS4271_ADCCTL_HPFDA 0x02
129#define CS4271_ADCCTL_HPFDB 0x01
130
131#define CS4271_MODE2_LOOP 0x10
132#define CS4271_MODE2_MUTECAEQUB 0x08
133#define CS4271_MODE2_FREEZE 0x04
134#define CS4271_MODE2_CPEN 0x02
135#define CS4271_MODE2_PDN 0x01
136
137#define CS4271_CHIPID_PART_MASK 0xF0
138#define CS4271_CHIPID_REV_MASK 0x0F
139
140/*
141 * Default CS4271 power-up configuration
142 * Array contains non-existing in hw register at address 0
143 * Array do not include Chip ID, as codec driver does not use
144 * registers read operations at all
145 */
146static const struct reg_default cs4271_reg_defaults[] = {
147 { CS4271_MODE1, 0, },
148 { CS4271_DACCTL, CS4271_DACCTL_AMUTE, },
149 { CS4271_DACVOL, CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR, },
150 { CS4271_VOLA, 0, },
151 { CS4271_VOLB, 0, },
152 { CS4271_ADCCTL, 0, },
153 { CS4271_MODE2, 0, },
154};
155
156static bool cs4271_volatile_reg(struct device *dev, unsigned int reg)
157{
158 return reg == CS4271_CHIPID;
159}
160
161struct cs4271_private {
162 unsigned int mclk;
163 bool master;
164 bool deemph;
165 struct regmap *regmap;
166 /* Current sample rate for de-emphasis control */
167 int rate;
168 /* GPIO driving Reset pin, if any */
169 int gpio_nreset;
170 /* GPIO that disable serial bus, if any */
171 int gpio_disable;
172 /* enable soft reset workaround */
173 bool enable_soft_reset;
174};
175
176static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = {
177SND_SOC_DAPM_INPUT("AINA"),
178SND_SOC_DAPM_INPUT("AINB"),
179
180SND_SOC_DAPM_OUTPUT("AOUTA+"),
181SND_SOC_DAPM_OUTPUT("AOUTA-"),
182SND_SOC_DAPM_OUTPUT("AOUTB+"),
183SND_SOC_DAPM_OUTPUT("AOUTB-"),
184};
185
186static const struct snd_soc_dapm_route cs4271_dapm_routes[] = {
187 { "Capture", NULL, "AINA" },
188 { "Capture", NULL, "AINB" },
189
190 { "AOUTA+", NULL, "Playback" },
191 { "AOUTA-", NULL, "Playback" },
192 { "AOUTB+", NULL, "Playback" },
193 { "AOUTB-", NULL, "Playback" },
194};
195
196/*
197 * @freq is the desired MCLK rate
198 * MCLK rate should (c) be the sample rate, multiplied by one of the
199 * ratios listed in cs4271_mclk_fs_ratios table
200 */
201static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
202 int clk_id, unsigned int freq, int dir)
203{
204 struct snd_soc_codec *codec = codec_dai->codec;
205 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
206
207 cs4271->mclk = freq;
208 return 0;
209}
210
211static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
212 unsigned int format)
213{
214 struct snd_soc_codec *codec = codec_dai->codec;
215 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
216 unsigned int val = 0;
217 int ret;
218
219 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
220 case SND_SOC_DAIFMT_CBS_CFS:
221 cs4271->master = 0;
222 break;
223 case SND_SOC_DAIFMT_CBM_CFM:
224 cs4271->master = 1;
225 val |= CS4271_MODE1_MASTER;
226 break;
227 default:
228 dev_err(codec->dev, "Invalid DAI format\n");
229 return -EINVAL;
230 }
231
232 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
233 case SND_SOC_DAIFMT_LEFT_J:
234 val |= CS4271_MODE1_DAC_DIF_LJ;
235 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
236 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
237 if (ret < 0)
238 return ret;
239 break;
240 case SND_SOC_DAIFMT_I2S:
241 val |= CS4271_MODE1_DAC_DIF_I2S;
242 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
243 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
244 if (ret < 0)
245 return ret;
246 break;
247 default:
248 dev_err(codec->dev, "Invalid DAI format\n");
249 return -EINVAL;
250 }
251
252 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
253 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
254 if (ret < 0)
255 return ret;
256 return 0;
257}
258
259static int cs4271_deemph[] = {0, 44100, 48000, 32000};
260
261static int cs4271_set_deemph(struct snd_soc_codec *codec)
262{
263 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
264 int i, ret;
265 int val = CS4271_DACCTL_DEM_DIS;
266
267 if (cs4271->deemph) {
268 /* Find closest de-emphasis freq */
269 val = 1;
270 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
271 if (abs(cs4271_deemph[i] - cs4271->rate) <
272 abs(cs4271_deemph[val] - cs4271->rate))
273 val = i;
274 val <<= 4;
275 }
276
277 ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL,
278 CS4271_DACCTL_DEM_MASK, val);
279 if (ret < 0)
280 return ret;
281 return 0;
282}
283
284static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
285 struct snd_ctl_elem_value *ucontrol)
286{
287 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
288 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
289
290 ucontrol->value.enumerated.item[0] = cs4271->deemph;
291 return 0;
292}
293
294static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
295 struct snd_ctl_elem_value *ucontrol)
296{
297 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
298 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
299
300 cs4271->deemph = ucontrol->value.enumerated.item[0];
301 return cs4271_set_deemph(codec);
302}
303
304struct cs4271_clk_cfg {
305 bool master; /* codec mode */
306 u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */
307 unsigned short ratio; /* MCLK / sample rate */
308 u8 ratio_mask; /* ratio bit mask for Master mode */
309};
310
311static struct cs4271_clk_cfg cs4271_clk_tab[] = {
312 {1, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
313 {1, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_15},
314 {1, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_2},
315 {1, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_3},
316 {1, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
317 {1, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_15},
318 {1, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_2},
319 {1, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_3},
320 {1, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
321 {1, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_15},
322 {1, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_2},
323 {1, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_3},
324 {0, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
325 {0, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_1},
326 {0, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_1},
327 {0, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_2},
328 {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
329 {0, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
330 {0, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_1},
331 {0, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_1},
332 {0, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_2},
333 {0, CS4271_MODE1_MODE_2X, 512, CS4271_MODE1_DIV_2},
334 {0, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
335 {0, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_1},
336 {0, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_1},
337 {0, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_2},
338 {0, CS4271_MODE1_MODE_4X, 256, CS4271_MODE1_DIV_2},
339};
340
341#define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
342
343static int cs4271_hw_params(struct snd_pcm_substream *substream,
344 struct snd_pcm_hw_params *params,
345 struct snd_soc_dai *dai)
346{
347 struct snd_soc_codec *codec = dai->codec;
348 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
349 int i, ret;
350 unsigned int ratio, val;
351
352 if (cs4271->enable_soft_reset) {
353 /*
354 * Put the codec in soft reset and back again in case it's not
355 * currently streaming data. This way of bringing the codec in
356 * sync to the current clocks is not explicitly documented in
357 * the data sheet, but it seems to work fine, and in contrast
358 * to a read hardware reset, we don't have to sync back all
359 * registers every time.
360 */
361
362 if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
363 !dai->capture_active) ||
364 (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
365 !dai->playback_active)) {
366 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
367 CS4271_MODE2_PDN,
368 CS4271_MODE2_PDN);
369 if (ret < 0)
370 return ret;
371
372 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
373 CS4271_MODE2_PDN, 0);
374 if (ret < 0)
375 return ret;
376 }
377 }
378
379 cs4271->rate = params_rate(params);
380
381 /* Configure DAC */
382 if (cs4271->rate < 50000)
383 val = CS4271_MODE1_MODE_1X;
384 else if (cs4271->rate < 100000)
385 val = CS4271_MODE1_MODE_2X;
386 else
387 val = CS4271_MODE1_MODE_4X;
388
389 ratio = cs4271->mclk / cs4271->rate;
390 for (i = 0; i < CS4171_NR_RATIOS; i++)
391 if ((cs4271_clk_tab[i].master == cs4271->master) &&
392 (cs4271_clk_tab[i].speed_mode == val) &&
393 (cs4271_clk_tab[i].ratio == ratio))
394 break;
395
396 if (i == CS4171_NR_RATIOS) {
397 dev_err(codec->dev, "Invalid sample rate\n");
398 return -EINVAL;
399 }
400
401 val |= cs4271_clk_tab[i].ratio_mask;
402
403 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
404 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
405 if (ret < 0)
406 return ret;
407
408 return cs4271_set_deemph(codec);
409}
410
411static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
412{
413 struct snd_soc_codec *codec = dai->codec;
414 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
415 int ret;
416 int val_a = 0;
417 int val_b = 0;
418
419 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
420 return 0;
421
422 if (mute) {
423 val_a = CS4271_VOLA_MUTE;
424 val_b = CS4271_VOLB_MUTE;
425 }
426
427 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA,
428 CS4271_VOLA_MUTE, val_a);
429 if (ret < 0)
430 return ret;
431
432 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB,
433 CS4271_VOLB_MUTE, val_b);
434 if (ret < 0)
435 return ret;
436
437 return 0;
438}
439
440/* CS4271 controls */
441static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
442
443static const struct snd_kcontrol_new cs4271_snd_controls[] = {
444 SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
445 0, 0x7F, 1, cs4271_dac_tlv),
446 SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
447 SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
448 SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
449 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
450 cs4271_get_deemph, cs4271_put_deemph),
451 SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
452 SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
453 SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
454 SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
455 SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
456 SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
457 SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
458 SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
459 SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
460 SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
461 7, 1, 1),
462};
463
464static const struct snd_soc_dai_ops cs4271_dai_ops = {
465 .hw_params = cs4271_hw_params,
466 .set_sysclk = cs4271_set_dai_sysclk,
467 .set_fmt = cs4271_set_dai_fmt,
468 .mute_stream = cs4271_mute_stream,
469};
470
471static struct snd_soc_dai_driver cs4271_dai = {
472 .name = "cs4271-hifi",
473 .playback = {
474 .stream_name = "Playback",
475 .channels_min = 2,
476 .channels_max = 2,
477 .rates = CS4271_PCM_RATES,
478 .formats = CS4271_PCM_FORMATS,
479 },
480 .capture = {
481 .stream_name = "Capture",
482 .channels_min = 2,
483 .channels_max = 2,
484 .rates = CS4271_PCM_RATES,
485 .formats = CS4271_PCM_FORMATS,
486 },
487 .ops = &cs4271_dai_ops,
488 .symmetric_rates = 1,
489};
490
491#ifdef CONFIG_PM
492static int cs4271_soc_suspend(struct snd_soc_codec *codec)
493{
494 int ret;
495 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
496
497 /* Set power-down bit */
498 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
499 CS4271_MODE2_PDN, CS4271_MODE2_PDN);
500 if (ret < 0)
501 return ret;
502
503 return 0;
504}
505
506static int cs4271_soc_resume(struct snd_soc_codec *codec)
507{
508 int ret;
509 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
510
511 /* Restore codec state */
512 ret = regcache_sync(cs4271->regmap);
513 if (ret < 0)
514 return ret;
515
516 /* then disable the power-down bit */
517 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
518 CS4271_MODE2_PDN, 0);
519 if (ret < 0)
520 return ret;
521
522 return 0;
523}
524#else
525#define cs4271_soc_suspend NULL
526#define cs4271_soc_resume NULL
527#endif /* CONFIG_PM */
528
529#ifdef CONFIG_OF
530static const struct of_device_id cs4271_dt_ids[] = {
531 { .compatible = "cirrus,cs4271", },
532 { }
533};
534MODULE_DEVICE_TABLE(of, cs4271_dt_ids);
535#endif
536
537static int cs4271_probe(struct snd_soc_codec *codec)
538{
539 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
540 struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
541 int ret;
542 bool amutec_eq_bmutec = false;
543
544#ifdef CONFIG_OF
545 if (of_match_device(cs4271_dt_ids, codec->dev)) {
546 if (of_get_property(codec->dev->of_node,
547 "cirrus,amutec-eq-bmutec", NULL))
548 amutec_eq_bmutec = true;
549
550 if (of_get_property(codec->dev->of_node,
551 "cirrus,enable-soft-reset", NULL))
552 cs4271->enable_soft_reset = true;
553 }
554#endif
555
556 if (cs4271plat) {
557 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
558 cs4271->enable_soft_reset = cs4271plat->enable_soft_reset;
559 }
560
561 if (gpio_is_valid(cs4271->gpio_nreset)) {
562 /* Reset codec */
563 gpio_direction_output(cs4271->gpio_nreset, 0);
564 udelay(1);
565 gpio_set_value(cs4271->gpio_nreset, 1);
566 /* Give the codec time to wake up */
567 udelay(1);
568 }
569
570 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
571 CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
572 CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
573 if (ret < 0)
574 return ret;
575 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
576 CS4271_MODE2_PDN, 0);
577 if (ret < 0)
578 return ret;
579 /* Power-up sequence requires 85 uS */
580 udelay(85);
581
582 if (amutec_eq_bmutec)
583 regmap_update_bits(cs4271->regmap, CS4271_MODE2,
584 CS4271_MODE2_MUTECAEQUB,
585 CS4271_MODE2_MUTECAEQUB);
586
587 return 0;
588}
589
590static int cs4271_remove(struct snd_soc_codec *codec)
591{
592 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
593
594 if (gpio_is_valid(cs4271->gpio_nreset))
595 /* Set codec to the reset state */
596 gpio_set_value(cs4271->gpio_nreset, 0);
597
598 return 0;
599};
600
601static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
602 .probe = cs4271_probe,
603 .remove = cs4271_remove,
604 .suspend = cs4271_soc_suspend,
605 .resume = cs4271_soc_resume,
606
607 .controls = cs4271_snd_controls,
608 .num_controls = ARRAY_SIZE(cs4271_snd_controls),
609 .dapm_widgets = cs4271_dapm_widgets,
610 .num_dapm_widgets = ARRAY_SIZE(cs4271_dapm_widgets),
611 .dapm_routes = cs4271_dapm_routes,
612 .num_dapm_routes = ARRAY_SIZE(cs4271_dapm_routes),
613};
614
615static int cs4271_common_probe(struct device *dev,
616 struct cs4271_private **c)
617{
618 struct cs4271_platform_data *cs4271plat = dev->platform_data;
619 struct cs4271_private *cs4271;
620
621 cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL);
622 if (!cs4271)
623 return -ENOMEM;
624
625 if (of_match_device(cs4271_dt_ids, dev))
626 cs4271->gpio_nreset =
627 of_get_named_gpio(dev->of_node, "reset-gpio", 0);
628
629 if (cs4271plat)
630 cs4271->gpio_nreset = cs4271plat->gpio_nreset;
631
632 if (gpio_is_valid(cs4271->gpio_nreset)) {
633 int ret;
634
635 ret = devm_gpio_request(dev, cs4271->gpio_nreset,
636 "CS4271 Reset");
637 if (ret < 0)
638 return ret;
639 }
640
641 *c = cs4271;
642 return 0;
643}
644
645#if defined(CONFIG_SPI_MASTER)
646
647static const struct regmap_config cs4271_spi_regmap = {
648 .reg_bits = 16,
649 .val_bits = 8,
650 .max_register = CS4271_LASTREG,
651 .read_flag_mask = 0x21,
652 .write_flag_mask = 0x20,
653
654 .reg_defaults = cs4271_reg_defaults,
655 .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
656 .cache_type = REGCACHE_RBTREE,
657
658 .volatile_reg = cs4271_volatile_reg,
659};
660
661static int cs4271_spi_probe(struct spi_device *spi)
662{
663 struct cs4271_private *cs4271;
664 int ret;
665
666 ret = cs4271_common_probe(&spi->dev, &cs4271);
667 if (ret < 0)
668 return ret;
669
670 spi_set_drvdata(spi, cs4271);
671 cs4271->regmap = devm_regmap_init_spi(spi, &cs4271_spi_regmap);
672 if (IS_ERR(cs4271->regmap))
673 return PTR_ERR(cs4271->regmap);
674
675 return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
676 &cs4271_dai, 1);
677}
678
679static int cs4271_spi_remove(struct spi_device *spi)
680{
681 snd_soc_unregister_codec(&spi->dev);
682 return 0;
683}
684
685static struct spi_driver cs4271_spi_driver = {
686 .driver = {
687 .name = "cs4271",
688 .owner = THIS_MODULE,
689 .of_match_table = of_match_ptr(cs4271_dt_ids),
690 },
691 .probe = cs4271_spi_probe,
692 .remove = cs4271_spi_remove,
693};
694#endif /* defined(CONFIG_SPI_MASTER) */
695
696#if IS_ENABLED(CONFIG_I2C)
697static const struct i2c_device_id cs4271_i2c_id[] = {
698 {"cs4271", 0},
699 {}
700};
701MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
702
703static const struct regmap_config cs4271_i2c_regmap = {
704 .reg_bits = 8,
705 .val_bits = 8,
706 .max_register = CS4271_LASTREG,
707
708 .reg_defaults = cs4271_reg_defaults,
709 .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
710 .cache_type = REGCACHE_RBTREE,
711
712 .volatile_reg = cs4271_volatile_reg,
713};
714
715static int cs4271_i2c_probe(struct i2c_client *client,
716 const struct i2c_device_id *id)
717{
718 struct cs4271_private *cs4271;
719 int ret;
720
721 ret = cs4271_common_probe(&client->dev, &cs4271);
722 if (ret < 0)
723 return ret;
724
725 i2c_set_clientdata(client, cs4271);
726 cs4271->regmap = devm_regmap_init_i2c(client, &cs4271_i2c_regmap);
727 if (IS_ERR(cs4271->regmap))
728 return PTR_ERR(cs4271->regmap);
729
730 return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
731 &cs4271_dai, 1);
732}
733
734static int cs4271_i2c_remove(struct i2c_client *client)
735{
736 snd_soc_unregister_codec(&client->dev);
737 return 0;
738}
739
740static struct i2c_driver cs4271_i2c_driver = {
741 .driver = {
742 .name = "cs4271",
743 .owner = THIS_MODULE,
744 .of_match_table = of_match_ptr(cs4271_dt_ids),
745 },
746 .id_table = cs4271_i2c_id,
747 .probe = cs4271_i2c_probe,
748 .remove = cs4271_i2c_remove,
749};
750#endif /* IS_ENABLED(CONFIG_I2C) */
751
752/*
753 * We only register our serial bus driver here without
754 * assignment to particular chip. So if any of the below
755 * fails, there is some problem with I2C or SPI subsystem.
756 * In most cases this module will be compiled with support
757 * of only one serial bus.
758 */
759static int __init cs4271_modinit(void)
760{
761 int ret;
762
763#if IS_ENABLED(CONFIG_I2C)
764 ret = i2c_add_driver(&cs4271_i2c_driver);
765 if (ret) {
766 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
767 return ret;
768 }
769#endif
770
771#if defined(CONFIG_SPI_MASTER)
772 ret = spi_register_driver(&cs4271_spi_driver);
773 if (ret) {
774 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
775 return ret;
776 }
777#endif
778
779 return 0;
780}
781module_init(cs4271_modinit);
782
783static void __exit cs4271_modexit(void)
784{
785#if defined(CONFIG_SPI_MASTER)
786 spi_unregister_driver(&cs4271_spi_driver);
787#endif
788
789#if IS_ENABLED(CONFIG_I2C)
790 i2c_del_driver(&cs4271_i2c_driver);
791#endif
792}
793module_exit(cs4271_modexit);
794
795MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
796MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
797MODULE_LICENSE("GPL");